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-- Write_Register --
--------------------
procedure Write_Register (This : in out STMPE811_Device;
Reg_Addr : UInt8;
Data : UInt8)
is
Status : SPI_Status;
begin
This.Chip_Select.Clear;
This.Port.Transmit (SPI_Data_8b'(Reg_Addr, Data), Status);
if Status /= Ok then
raise Program_Error with "Timeout while reading TC data";
end if;
This.Chip_Select.Set;
end Write_Register;
---------------
-- IOE_Reset --
---------------
procedure IOE_Reset (This : in out STMPE811_Device) is
Discard : UInt8;
begin
This.Write_Register (IOE_REG_SYS_CTRL1, 16#02#);
-- Give some time for the reset
This.Time.Delay_Milliseconds (10);
for X in UInt8 range 0 .. 64 loop
Discard := This.Read_Register (X);
end loop;
This.Write_Register (IOE_REG_SYS_CTRL2, 16#00#);
end IOE_Reset;
--------------------------
-- IOE_Function_Command --
--------------------------
procedure IOE_Function_Command (This : in out STMPE811_Device;
Func : UInt8;
Enabled : Boolean)
is
Reg : UInt8 := This.Read_Register (IOE_REG_SYS_CTRL2);
begin
-- CTRL2 functions are disabled when corresponding bit is set
if Enabled then
Reg := Reg and (not Func);
else
Reg := Reg or Func;
end if;
This.Write_Register (IOE_REG_SYS_CTRL2, Reg);
end IOE_Function_Command;
-------------------
-- IOE_AF_Config --
-------------------
procedure IOE_AF_Config (This : in out STMPE811_Device;
Pin : UInt8;
Enabled : Boolean) is
Reg : UInt8 := This.Read_Register (IOE_REG_GPIO_AF);
begin
if Enabled then
Reg := Reg or Pin;
else
Reg := Reg and (not Pin);
end if;
This.Write_Register (IOE_REG_GPIO_AF, Reg);
end IOE_AF_Config;
----------------
-- Get_IOE_ID --
----------------
function Get_IOE_ID (This : in out STMPE811_Device) return UInt16 is
begin
return (UInt16 (This.Read_Register (0)) * (2**8))
or UInt16 (This.Read_Register (1));
end Get_IOE_ID;
----------------
-- Initialize --
----------------
function Initialize (This : in out STMPE811_Device) return Boolean
is
Discard : UInt8;
begin
This.Write_Register (IOE_REG_SYS_CTRL1, 16#02#);
-- Give some time for the reset